Slip is determined from the number of the difference in the number of wheel revolutions over a measured distance of the tractor under load and under no-load. Measurements here are made on a LEROI Centaur tractor. Written on the rear wheel is,...

Moment of impact during demonstration at Mead, NE (Experiment station). It shows the 1000kg (2205 lbs) weight at the moment of impact on the rear upper part of the ROPS.
It was found that these "dynamic" tests were difficult to make repeatable,...